I never walk into the studio and say, I'm going to write a song called... 'X' or called 'Slow Me Down.' I write a ton of lyrics, often the title is somewhere in those 10 pages of... I call it brain vomit. It's kind of like whatever comes out of my head and I'm unabashedly just writing it down.

Zajac. Debuting at the Sundance Film Festival the film won the Special Jury Award for Outstanding Ensemble Performance. In 2012 in addition to filming the third season of Shameless Rossum signed onto two film projects.

She currently stars on the Showtime dramedy Shameless as Fiona Gallagher. Her role in Mystic River (2003) garnered her wider recognition.